508
Home
Dr.Wu
Research
Member
Publications
News
Contact
Publications
 
All
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2007
2006
   
Interfacial Interaction-Induced Temperature-Dependent Mechanical Property of Graphene-PDMS Nanocomposite
Posted:2019-11-04 09:50    Column:2020

X. Wang, Z.K. Shi, J.Y. Wu, S.Q. Hu, X.H. Zhou, Q. Liu,F.D. Meng, D. Tan, Y.J. Zhang, Y. Zhao, Z-S Wu, Y.F. Lei,L.J. Xue*

Journal of Materials Science, 2020, 55, 1553-1561.

DOI:10.1007/s10853-019-04126-y [PDF]

Polydimethylsiloxane (PDMS) and graphene-PDMS nanocomposites (GP) have been widely studied because of their excellent properties, of which the elastic modulus is very important for various applications. Here, the dependence of the elastic modulus of properly cured PDMS and GP on the temperature has been investigated. For both PDMS and GP, a critical temperature (Tc) has been found, which originates from the strong affinity of PDMS chains to the PDMS network and graphene sheet, as suggested by molecular dynamics simulation. Graphene inhibits the cross-linking of PDMS close to its surface, which leads to the reduced elastic modulus of GP (EGP). Only when the temperature is aboveTc,EGPincreases with temperature. This is the result of the entropy elasticity of PDMS and the re-initiated cross-linking of PDMS. However, the elastic moduli of PDMS and GP are independent of the temperature belowTc. Here, the study provides a guideline for the preparation and using of PDMS and its composite at various temperatures.

Dalian Institute of Chemical Physics, CAS
457 Zhongshan Road Dalian, China 116023
E-mail: wuzs@dicp.ac.cn

Copyright © 2D Materials Chemistry & Energy Applications Group. All Rights Reserved.

Home / Dr.Wu / Research / Member / Publications / News / Contact